There are a rapidly growing number of opportunities in the STEM fields on a relatively old frontier: the spread of diseases.
Conditions surrounding the developing world play a key role in creating this situation. One of these factors is that many countries that are generally accepted as “developing” exist in relatively warm and specifically tropical climates. Additionally, these countries often have high birth rates, which lead to growing populations and urbanization. These high birth rates are arguably an economic symptom of development. This confluence of factors in these hot climates produces cities with swelling populations and low standards of living.